Some common symptoms of glaucoma have been highlighted by one expert who is hoping to spread awareness of the condition and reduce the number of people going blind.
Sarah Zerbib, head of marketing and PR at the International Glaucoma Association (IGA), said the fact that 250,000 people in the UK alone are losing their sight due to glaucoma at the moment means that awareness needs to be greater.
In most cases, glaucoma has no symptoms, which means that a large amount of vision could be lost before it is noticed, she explained.
"The danger with primary open angle glaucoma - chronic condition, is that the brain compensates for the loss in one eye and therefore the patient doesn"t notice anything amiss. Not all glaucomas are symptomatic though," Ms Zerbib explained.
She is aiming to raise awareness of the condition and how it can be identified and treated.
by Martin Burns